TY - JOUR T1 - Optimization of FSW parameters for mechanical properties of Nano/UFG Aluminum- scandium alloys by using design of experiment method TT - بهینه‌سازی پارامترهای موثر بر خواص مکانیکی آلیاژهای نانو/فوق ریزدانه آلومینیوم- اسکاندیم در جوشکاری اصطکاکی– اختلاطی به وسیله طراحی آماری آزمایش JF - JWSTI JO - JWSTI VL - 3 IS - 2 UR - http://jwsti.iut.ac.ir/article-1-163-en.html Y1 - 2018 SP - 79 EP - 89 KW - Friction stir welding KW - Al-Sc alloys KW - Mechanical properties KW - Microstructure KW - Design of experiment KW - Texture. N2 - In the present research, the parameters of FSW process were optimized for the mechanical properties of thin aluminum- scandium alloys by a design of experiment (DOE) technique. The optimum conditions providing the highest mechanical properties were found by this method. Among the three factors and three levels tested, it was concluded that the tool rotational speed had the most significant effect on the mechanical properties and the travel speed had the next most significant effect. The effect of tool tilt angle was less important when compared to the other factors. The EBSD results demonstrated a recrystallized equi axial structure and the existence of a mixture of B and Ccomponents in the weld nugget. M3 ER -